Revenues for 2013 increased 60 per cent to $3.51 billion from $2.19 billion in 2012.

Fourth quarter revenue hit $879.4 million, the company announced.

“Our fourth-quarter results were below expectations, as an unanticipated slowdown due to adverse weather and the timing of holidays in December affected our business after a very strong start in October,” said Alan McKim, Clean Harbors’ chairman and CEO, announcing the results on February 26, 2014.